*{
    margin: 0;
    padding: 0;
}

.game{
    width:600px ;
    height: 600px;
    border: 1px solid red;
    margin: 50px auto 0;
    position: relative;
    /*子绝父相*/
        overflow: hidden;
}

.sky{
    background: url("../img/sky.png");
    left: 0;
    top: 0;
    width :1200px;
    height: 500px;
    position: absolute;
    /*animation: move 3s infinite linear;*/
}

.land{
    /*background: url("../img/land.png");*/
    background-color: #080707;
    background-image: linear-gradient(180deg, #080707 0%, #7580a0 50%, #e42929 100%);
    left: 0;
    bottom: 0;
    width: 1200px;
    height: 100px;
    position:absolute;
    /*animation: move 3s infinite linear;*/

}
.bird{
    position: absolute;
    left: 100px;
    top: 200px;
    width: 34px;
    height: 25px;
    background: url("../img/bird.png");
}

.start{
    width:120px;
    height: 60px;
    line-height: 60px;
    text-align: center;
    color: #9c2a2a;
    background: #d99133;
    font-size: 25px;
    cursor: pointer;
    position: absolute;
    top: 50%;
    left:50%;
    transform: translate(-50%,-50%);
    border-radius:10px ;

}

#donghua{
    animation: move 3s infinite linear;
}

@keyframes move {
    0%{
        left: 0;
    }
    100%{
        left: -600px;
    }
}

.zhuzi{
    width: 52px;
    height: 500px;
    position: absolute;
    left: 620px;

}
.up{
    background-image: url("../img/pipeUp.png");
    width: 52px;
    height: 420px;
    position: absolute;

    /*改变的*/
    top: -200px;
}
.down{
    background-image: url("../img/Downpipe.png");
    width: 52px;
    height: 180px;
    position: absolute;
    bottom: 0;
}

